APA (7th ed.) Citation

Natanson, I. P., & Boron, L. F. (1964). Theory of Functions of a Real Variable. Frederic Ungar.

Chicago Style (17th ed.) Citation

Natanson, I. P., and Leo F. Boron. Theory of Functions of a Real Variable. New York: Frederic Ungar, 1964.

MLA (9th ed.) Citation

Natanson, I. P., and Leo F. Boron. Theory of Functions of a Real Variable. Frederic Ungar, 1964.